import gi
import logging
import numpy as np

gi.require_version("Gtk", "3.0")
from gi.repository import Gtk, Pango

import matplotlib.pyplot as plt
from matplotlib import cm
from matplotlib import rc
from mpl_toolkits.mplot3d import Axes3D
from matplotlib.backends.backend_gtk3agg import FigureCanvasGTK3Agg as FigureCanvas
from matplotlib.ticker import LinearLocator

from ks_includes.KlippyGcodes import KlippyGcodes
from ks_includes.screen_panel import ScreenPanel


def create_panel(*args):
    return BedMeshPanel(*args)


class BedMeshPanel(ScreenPanel):
    active_mesh = None
    graphs = {}

    def initialize(self, panel_name):

        self.show_create = False

        scroll = self._gtk.ScrolledWindow()

        # Create a grid for all profiles
        self.labels['profiles'] = Gtk.Grid()
        scroll.add(self.labels['profiles'])

        addprofile = self._gtk.ButtonImage("increase", "  %s" % _("Add bed mesh profile"),
                                           "color1", .5, Gtk.PositionType.LEFT, False)
        addprofile.connect("clicked", self.show_create_profile)
        addprofile.set_size_request(60, 0)
        addprofile.set_hexpand(False)
        addprofile.set_halign(Gtk.Align.END)
        abox = Gtk.Box(spacing=0)
        abox.set_vexpand(False)
        abox.add(addprofile)

        # Create a box to contain all of the above
        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=0)
        box.set_vexpand(True)
        box.pack_start(abox, False, False, 0)
        box.pack_end(scroll, True, True, 0)

        self.load_meshes()

        self.labels['main_box'] = box
        self.content.add(self.labels['main_box'])

    def activate(self):
        for child in self.content.get_children():
            self.content.remove(child)
        self.content.add(self.labels['main_box'])

        am = self._screen.printer.get_stat("bed_mesh", "profile_name")
        self.activate_mesh(am)

    def activate_mesh(self, profile):
        if profile == "":
            profile = "default"

        logging.debug("Activating profile: %s %s" % (self.active_mesh, profile))
        if profile != self.active_mesh:
            if profile not in self.profiles:
                self.add_profile(profile)
            if self.active_mesh is not None and self.active_mesh in self.profiles:
                a = self.profiles[self.active_mesh]
                a['buttons'].remove(a['refresh'])
                a['buttons'].pack_start(a['load'], False, False, 0)
            self.active_mesh = profile
            if self.active_mesh is not None:
                a = self.profiles[profile]
                a['buttons'].remove(a['load'])
                a['buttons'].pack_start(a['refresh'], False, False, 0)
            self._screen.show_all()

    def add_profile(self, profile):

        frame = Gtk.Frame()

        name = Gtk.Label()
        name.set_markup("<big><b>%s</b></big>" % profile)
        name.set_hexpand(True)
        name.set_vexpand(True)
        name.set_halign(Gtk.Align.START)
        name.set_line_wrap(True)
        name.set_line_wrap_mode(Pango.WrapMode.WORD_CHAR)

        load = self._gtk.ButtonImage("load", _("Load"), "color2")
        load.connect("clicked", self.send_load_mesh, profile)
        load.set_size_request(60, 0)
        load.set_hexpand(False)
        load.set_halign(Gtk.Align.END)

        refresh = self._gtk.ButtonImage("refresh", _("Calibrate"), "color4")
        refresh.connect("clicked", self.calibrate_mesh)
        refresh.set_size_request(60, 0)
        refresh.set_hexpand(False)
        refresh.set_halign(Gtk.Align.END)

        view = self._gtk.ButtonImage("bed-level", _("View Mesh"), "color1")
        view.connect("clicked", self.show_mesh, profile)
        view.set_size_request(60, 0)
        view.set_hexpand(False)
        view.set_halign(Gtk.Align.END)

        info = self._gtk.ButtonImage("info", None, "color3")
        info.connect("clicked", self.show_mesh, profile)
        info.set_size_request(60, 0)
        info.set_hexpand(False)
        info.set_halign(Gtk.Align.END)

        save = self._gtk.ButtonImage("sd", _("Save"), "color3")
        save.connect("clicked", self.send_save_mesh, profile)
        save.set_size_request(60, 0)
        save.set_hexpand(False)
        save.set_halign(Gtk.Align.END)

        delete = self._gtk.ButtonImage("cancel", _("Delete"), "color3")
        delete.connect("clicked", self.send_remove_mesh, profile)
        delete.set_size_request(60, 0)
        delete.set_hexpand(False)
        delete.set_halign(Gtk.Align.END)

        labels = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
        labels.add(name)

        dev = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=5)
        dev.set_margin_top(10)
        dev.set_margin_end(15)
        dev.set_margin_start(15)
        dev.set_margin_bottom(10)
        dev.set_hexpand(True)
        dev.set_vexpand(False)
        dev.add(labels)

        buttons = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=5)
        logging.debug("Profile compare: '%s' '%s'" % (self.active_mesh, profile))
        if self.active_mesh == profile:
            buttons.pack_start(refresh, False, False, 0)
        else:
            buttons.pack_start(load, False, False, 0)
        # buttons.pack_end(info, False, False, 0)

        if profile != "default":
            buttons.pack_end(save, False, False, 0)
            buttons.pack_end(delete, False, False, 0)
        buttons.pack_end(view, False, False, 0)

        dev.add(buttons)
        frame.add(dev)

        self.profiles[profile] = {
            "box": dev,
            "buttons": buttons,
            "row": frame,
            "load": load,
            "refresh": refresh,
            "save": save,
            "view": view,
        }

        pl = list(self.profiles)
        if "default" in pl:
            pl.remove('default')
        profiles = sorted(pl)
        pos = profiles.index(profile) + 1 if profile != "default" else 0

        self.labels['profiles'].insert_row(pos)
        self.labels['profiles'].attach(self.profiles[profile]['row'], 0, pos, 1, 1)
        self.labels['profiles'].show_all()

    def back(self):
        if self.show_create is True:
            self.remove_create()
            return True
        return False

    def create_profile(self, widget):
        name = self.labels['profile_name'].get_text()
        if " " in name:
            name = '"%s"' % name

        self._screen._ws.klippy.gcode_script("BED_MESH_PROFILE SAVE=%s" % name)
        self.remove_create()

    def calibrate_mesh(self, widget):
        if self._screen.printer.get_stat("toolhead", "homed_axes") != "xyz":
            self._screen._ws.klippy.gcode_script(KlippyGcodes.HOME)

        self._screen._ws.klippy.gcode_script(
            "BED_MESH_CALIBRATE"
        )

        if not (self._printer.config_section_exists("probe") or self._printer.config_section_exists("bltouch")):
            self.menu_item_clicked(widget, "refresh", {"name": "Mesh calibrate", "panel": "zcalibrate"})

    def load_meshes(self):
        bm_profiles = self._screen.printer.get_config_section_list("bed_mesh ")
        self.profiles = {}
        for prof in bm_profiles:
            self.add_profile(prof[9:])

    def process_update(self, action, data):
        if action == "notify_status_update":
            if "bed_mesh" in data and "profile_name" in data['bed_mesh']:
                if data['bed_mesh']['profile_name'] != self.active_mesh:
                    self.activate_mesh(data['bed_mesh']['profile_name'])

    def remove_create(self):
        if self.show_create is False:
            return

        self._screen.remove_keyboard()
        for child in self.content.get_children():
            self.content.remove(child)

        self.show_create = False
        self.content.add(self.labels['main_box'])
        self.content.show()

    def remove_profile(self, profile):
        if profile not in self.profiles:
            return

        pl = list(self.profiles)
        if "default" in pl:
            pl.remove('default')
        profiles = sorted(pl)
        pos = profiles.index(profile) + 1 if profile != "default" else 0
        self.labels['profiles'].remove_row(pos)
        del self.profiles[profile]

    def send_load_mesh(self, widget, profile):
        self._screen._ws.klippy.gcode_script(
            KlippyGcodes.bed_mesh_load(profile)
        )

    def send_save_mesh(self, widget, profile):
        self._screen._ws.klippy.gcode_script(
            KlippyGcodes.bed_mesh_save(profile)
        )

    def send_remove_mesh(self, widget, profile):
        self._screen._ws.klippy.gcode_script(
            KlippyGcodes.bed_mesh_remove(profile)
        )
        self.remove_profile(profile)

    def show_create_profile(self, widget):

        for child in self.content.get_children():
            self.content.remove(child)

        if "create_profile" not in self.labels:
            pl = self._gtk.Label(_("Profile Name:"))
            pl.set_hexpand(False)
            self.labels['profile_name'] = Gtk.Entry()
            self.labels['profile_name'].set_text('')
            self.labels['profile_name'].set_hexpand(True)
            self.labels['profile_name'].connect("activate", self.create_profile)
            self.labels['profile_name'].connect("focus-in-event", self._screen.show_keyboard)
            self.labels['profile_name'].grab_focus_without_selecting()

            save = self._gtk.ButtonImage("sd", _("Save"), "color3")
            save.set_hexpand(False)
            save.connect("clicked", self.create_profile)

            box = Gtk.Box()
            box.pack_start(self.labels['profile_name'], True, True, 5)
            box.pack_start(save, False, False, 5)

            self.labels['create_profile'] = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=5)
            self.labels['create_profile'].set_valign(Gtk.Align.CENTER)
            self.labels['create_profile'].set_hexpand(True)
            self.labels['create_profile'].set_vexpand(True)
            self.labels['create_profile'].pack_start(pl, True, True, 5)
            self.labels['create_profile'].pack_start(box, True, True, 5)

        self.content.add(self.labels['create_profile'])
        self._screen.show_keyboard()
        self.show_create = True

    def show_mesh(self, widget, profile):

        bm = self._printer.get_config_section("bed_mesh %s" % profile)
        if bm is False:
            logging.info("Unable to load profile: %s" % profile)
            return

        if profile == self.active_mesh:
            abm = self._printer.get_stat("bed_mesh")
            if abm is None:
                logging.info("Unable to load active mesh: %s" % profile)
                return
            x_range = [int(abm['mesh_min'][0]), int(abm['mesh_max'][0])]
            y_range = [int(abm['mesh_min'][1]), int(abm['mesh_max'][1])]
            minz_mesh = min(min(abm['mesh_matrix']))
            maxz_mesh = max(max(abm['mesh_matrix']))
            # Do not use a very small zscale, because that could be misleading
            if minz_mesh > -0.5:
                minz_mesh = -0.5
            if maxz_mesh < 0.5:
                maxz_mesh = 0.5
            z_range = [minz_mesh, maxz_mesh]
            counts = [len(abm['mesh_matrix'][0]), len(abm['mesh_matrix'])]
            deltas = [(x_range[1] - x_range[0]) / (counts[0] - 1), (y_range[1] - y_range[0]) / (counts[1] - 1)]
            x = [(i * deltas[0]) + x_range[0] for i in range(counts[0])]
            y = [(i * deltas[0]) + y_range[0] for i in range(counts[1])]
            x, y = np.meshgrid(x, y)
            z = np.asarray(abm['mesh_matrix'])
        else:
            x_range = [int(bm['min_x']), int(bm['max_x'])]
            y_range = [int(bm['min_y']), int(bm['max_y'])]
            z_range = [min(min(bm['points'])), max(max(bm['points']))]
            deltas = [(x_range[1] - x_range[0]) / (int(bm['x_count']) - 1),
                      (y_range[1] - y_range[0]) / (int(bm['y_count']) - 1)]
            x = [(i * deltas[0]) + x_range[0] for i in range(bm['x_count'])]
            y = [(i * deltas[0]) + y_range[0] for i in range(bm['y_count'])]
            x, y = np.meshgrid(x, y)
            z = np.asarray(bm['points'])

        rc('axes', edgecolor="#e2e2e2", labelcolor="#e2e2e2")
        rc(('xtick', 'ytick'), color="#e2e2e2")
        fig = plt.figure(facecolor='#12121277')
        ax = Axes3D(fig, azim=245, elev=23)
        ax.set(title=profile, xlabel="X", ylabel="Y", facecolor='none')
        ax.spines['bottom'].set_color("#e2e2e2")
        fig.add_axes(ax)
        surf = ax.plot_surface(x, y, z, cmap=cm.coolwarm, vmin=-0.1, vmax=0.1)

        chartbox = ax.get_position()
        ax.set_position([chartbox.x0, chartbox.y0 + 0.1, chartbox.width * .92, chartbox.height])

        ax.set_zlim(z_range[0], z_range[1])
        ax.zaxis.set_major_locator(LinearLocator(5))
        # A StrMethodFormatter is used automatically
        ax.zaxis.set_major_formatter('{x:.02f}')
        fig.colorbar(surf, shrink=0.7, aspect=5, pad=0.25)

        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
        box.set_hexpand(True)
        box.set_vexpand(True)

        title = Gtk.Label()
        title.set_markup("<b>%s</b>" % profile)
        title.set_hexpand(True)
        title.set_halign(Gtk.Align.CENTER)

        canvas_box = Gtk.Box()
        canvas_box.set_hexpand(True)
        canvas_box.set_vexpand(True)

        box.add(title)
        box.add(canvas_box)

        buttons = [
            {"name": _("Close"), "response": Gtk.ResponseType.CANCEL}
        ]
        self._gtk.Dialog(self._screen, buttons, box, self._close_dialog)

        alloc = canvas_box.get_allocation()
        canvas = FigureCanvas(fig)
        canvas.set_size_request(alloc.width, self._screen.height / 3 * 2)
        canvas_box.add(canvas)
        canvas_box.show_all()
        # Remove the "matplotlib-canvas" class which forces a white background.
        # https://github.com/matplotlib/matplotlib/commit/3c832377fb4c4b32fcbdbc60fdfedb57296bc8c0
        style_ctx = canvas.get_style_context()
        for css_class in style_ctx.list_classes():
            style_ctx.remove_class(css_class)

    def _close_dialog(self, widget, response):
        widget.destroy()
